SM51A-2523
Multi-point, multi-scale observation of the near-Earth current sheet reconfiguration during storm-time multi-onset substorms
Friday, 18 December 2015
Poster Hall (Moscone South)
Rumi Nakamura1, Wolfgang Baumjohann1, Ferdinand Plaschke2, Yasuhito Narita3, Daniel Schmid4, Evgeny V Panov5, Maria Andriopoulou5, Zoltan Voros4, Werner Magnes1, David Fischer4, Manfred Steller1, James L Burch6, Roy B Torbert7, Christopher T Russell8, Robert J Strangeway9, Hannes Karl Leinweber10, Guan Le11, Kenneth R Bromund11, Brian J Anderson12, Mark Chutter13, James A Slavin14, Larry Kepko11, Hans Vaith7, Olivier Le Contel15, Matthew R Argall7, Robert E Ergun16, Per-Arne Lindqvist17, Goran Tage Marklund18, Yuri V Khotyaintsev19, Craig J Pollock20, John Dorelli11, Daniel J Gershman21, Stephen A Fuselier6, Barry Mauk22, Daniel N. Baker23, Barbara L Giles11, Thomas Earle Moore24, Howard J Singer25, Victor A Sergeev26 and C Philippe Escoubet27, (1)Space Research Institute, Austrian Academy of Sciences, Graz, Austria, (2)IWF ÖAW, Graz, Austria, (3)Space Research Institute, Schmiedlstr. 6 A-8042 Graz, Austria, (4)IWF Institute for Space Research, Graz, Austria, (5)Austrian Academy of Sciences, Vienna, Austria, (6)Southwest Research Institute, San Antonio, TX, United States, (7)University of New Hampshire Main Campus, Durham, NH, United States, (8)University of California Los Angeles, IGPP/EPSS, Los Angeles, CA, United States, (9)University of California Los Angeles, Los Angeles, CA, United States, (10)Institute of Geophysics and Planetary Physics Los Angeles, Los Angeles, CA, United States, (11)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (12)Johns Hopkins University, Baltimore, MD, United States, (13)University of New Hampshire, Durham, NH, United States, (14)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (15)Laboratoire de Physique des Plasmas (UMR7648), CNRS/Ecole Polytechnique/UPMC/Univ. Paris Sud/Obs. de Paris, Paris, France, (16)University of Colorado, Laboratory for Atmospheric and Space Research, Boulder, CO, United States, (17)KTH Royal Institute of Technology, Stockholm, Sweden, (18)Royal Inst Technology, KTH/EES, Stockholm, Sweden, (19)IRF Swedish Institute of Space Physics Uppsala, Uppsala, Sweden, (20)NASA Goddard Space Flight Center, Heliophysics Sci. Div., Greenbelt, MD, United States, (21)University of Michigan Ann Arbor, Department of Atmospheric, Oceanic and Space Sciences, Ann Arbor, MI, United States, (22)Applied Physics Laboratory Johns Hopkins, Laurel, MD, United States, (23)University of Colorado at Boulder, Boulder, CO, United States, (24)NASA Goddard Space Flight Ctr, Greenbelt, MD, United States, (25)NOAA Boulder, Boulder, CO, United States, (26)St Petersburg State University, St Petersburg, Russia, (27)ESTEC, Noordwijk, Netherlands
Abstract:
On June 23, 2015 between 03 and 06 UT, during the recovery phase of a storm, signatures of two major substorms with multiple-onsets are detected by a fleet of spacecraft in the near-Earth region providing an unique opportunity to study the evolution of the near-Earth current sheet reconfiguration from sub-ion scale to larger scale across the inner magnetosphere. The two onsets around 0315 and 0505 are observed by MMS near the boundary of the premidnight-plasma sheet as a thinning of the current sheet and as dipolarization at GOES 13 and 15 in the dusk to premidnight region, then followed by crossing of an active separatrix region. By using high-resolution magnetic field data onboard MMS, we investigate the detailed propagation properties of the disturbances and structures based on different multi-point analysis techniques (timing, gradient, and wave telescope analysis). By also comparing with current wedge model from ground-based data we identify the 3D evolution of the near-Earth current sheet.
